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Symmetry
Special Issues
Multi-Physics Phenomena in Geomaterials
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Multi-Physics Phenomena in Geomaterials

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 2428

Special Issue Editors

Dr. Giulia Guida

E-Mail Website1 Website2
Guest Editor
Università degli Studi di Roma Tor Vergata, via del Politecnico 1, 00133 Rome, Italy
Interests: multi-phase coupled numerical analyses; micro-mechanics of granular crushable materials; fractal analysis of contours; morphology characterisation
Dr. Zeynep Karatza

E-Mail Website1 Website2
Guest Editor
School of Engineering, University of Edinburgh, Edinburgh EH9 3BF, UK
Interests: geomechanics
Dr. Francois Guillard

E-Mail Website1 Website2
Guest Editor
Faculty of Engineering, University of Sydney, Sydney, NSW 2006, Australia
Interests: behaviour of granular materials
Dr. Mingdong Wei

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
Interests: rock mechanics; rock engineering; engineering geology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

A deep understanding of phenomena involving geomaterials is generally challenging due to the coexistence of several constituents and phases, their multi-physical nature, and complex and non-linear material behaviour. Multi-physics phenomena, to be fully resolved, require the participation of several scientific disciplines.

This Special Issue invites researchers to contribute with original papers highlighting the importance of a multi-physics approach to address phenomena dealing with geomaterials in the following application fields:

  • Environmental protection;
  • Geotechnical and geo-environmental systems;
  • Engineering geology.

Examples of the physical processes that this Special Issue aims to address are as follows: hydraulic transport (pore fluid movement in single or multi-phase conditions), mechanical response (stress and strain, settlements, failure conditions, symmetric and asymmetric crack propagation modes), thermal effects (thermal expansion or contraction, phase changes) and chemical reactions (transport and reaction of chemical species, degradation effects). The contributions can be experimental, numerical, or theoretical,  emphasizing coupling the various physical processes and/or approaches.

Dr. Giulia Guida
Dr. Zeynep Karatza
Dr. Francois Guillard
Dr. Mingdong Wei
Guest Editors 

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • multi-physics
  • geomaterials
  • coupled processes
  • environment
  • thermo-hydro-chemo-mechanical processes

Published Papers (2 papers)

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Research

23 pages, 12120 KiB  
Article
A Theoretical and Experimental Investigation on the Fracture Mechanism of Center-Symmetric Closed Crack in Compacted Clay under Compression–Shear Loading
by Shiyuan Huang, Xiaofeng Zhang, Wenbing Yu, Xudong Li, Songyang Jin and Hongbo Du
Symmetry 2023, 15(8), 1519; https://0-doi-org.brum.beds.ac.uk/10.3390/sym15081519 - 01 Aug 2023
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Abstract
In this study, a modified maximum tangential stress criterion by considering T-stress and uniaxial compression tests have been utilized to theoretically and experimentally reveal the fracture initiation mechanism of a center-symmetric closed crack in compacted clay. The results show that wing cracks occur [...] Read more.
In this study, a modified maximum tangential stress criterion by considering T-stress and uniaxial compression tests have been utilized to theoretically and experimentally reveal the fracture initiation mechanism of a center-symmetric closed crack in compacted clay. The results show that wing cracks occur in the linear elastic phase of the stress-strain curve. In the plastic phase of the stress-strain curve, the wing cracks extend gradually and the shear cracks occur. The crack initiation stress and peak stress of compacted clay first decrease with the rise in pre-crack inclination angle (β = 0°–40°), and then increase with the rise in pre-crack inclination angle (β = 50°–90°). When the pre-crack inclination angle is relatively small or large (β ≤ 10° or β ≥ 70°), the crack type is mainly tension cracks. Secondary shear cracks occur when the pre-crack inclination angle is 10°–80°. When the dimensionless crack length is larger than 0.35, the crack types include wing-type tension cracks and secondary shear cracks. The experimental results were compared with the theoretical values. It was found that the critical size rc of compacted clay under compression-shear loading was 0.75 mm, smaller than the value calculated by the empirical formula (12 mm). The MTS criterion considering T-stress can be used to predict the compression-shear fracture behavior of compacted clay. Full article
(This article belongs to the Special Issue Multi-Physics Phenomena in Geomaterials)
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16 pages, 3001 KiB  
Article
Evaluation of Coastal Zone Construction Based on Theories of the Combination of Empowerment Judgment and Neural Networks: The Example of the Putian Coastal Zone
by Yunfeng Li, Lili Hou, Qing Zhang, Weiya Ge, Zongfang Chen and Tianyu Meng
Symmetry 2022, 14(5), 1028; https://0-doi-org.brum.beds.ac.uk/10.3390/sym14051028 - 18 May 2022
Viewed by 1327
Abstract
Coastal engineering construction suitability evaluation methods are too empirical and difficult to quantify. Considering these weaknesses, in order to determine the weight of each factor reasonably, and to analyze the suitability of coastal zone construction comprehensively, the theory of establishing a coastal zone [...] Read more.
Coastal engineering construction suitability evaluation methods are too empirical and difficult to quantify. Considering these weaknesses, in order to determine the weight of each factor reasonably, and to analyze the suitability of coastal zone construction comprehensively, the theory of establishing a coastal zone construction suitability evaluation model based on a Rough Set (RS) and an Analytic Hierarchy Process (AHP) is proposed. In total, 20 typical coastal areas of Putian are selected, and the main impact factors are determined according to a port dock, pollution-prone industry, and an electric power plant. The contribution rate and weight of each factor for the construction of a coastal zone are analyzed by the combination evaluation model, and the final evaluation result is consistent with the actual investigation situation. Finally, 52 evaluation units of the Putian coastal zone are evaluated by Neural Networks (NNs). The weight of the impact factors is made more objective by using the training sample set of the combination evaluation model as the sample set of the neural network. The learning speed and accuracy of the network are improved, and the and the evaluation result is consistent with the actual investigation situation. In a word, it is effective to perform the suitability evaluation of the coastal zone construction using the RS-AHP-NN proposed model, and it can be applied in practical engineering. Full article
(This article belongs to the Special Issue Multi-Physics Phenomena in Geomaterials)
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